两个城镇之间的差异在太阳活动(东部和西部半球)-地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 04 - 17 - t19:46:49z //www.hoelymoley.com/feeds/question/10127 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/10127 3 两个城镇之间的差异在太阳活动(东部和西部半球) 断头谷 //www.hoelymoley.com/users/7798 2017 - 04 - 16 - t19:44:47z 2017 - 04 - 18 - t14:36:30z < p >我在一个小镇长大与热,阳光海岸萨默斯(每次30 - 35°C)。我记得我自己,我的朋友和亲人呆在户外一天12小时。我们不需要防晒霜,从未使用过它。它被认为是,皮肤可以燃烧的第一天日光浴和预防措施,即。“把一件长袖的衬衫在三小时后在阳光直射下”。我家乡的坐标是< a href = " https://www.google.com.au/maps/place/46%C2%B045& # 39; 35.0% 22 N + 36% c2%b047& # 39; 04.0% 22 E / @46.7597259, 36.7822504, 17个z / data = ! 3 m1 ! 4 b1 ! 4 m5 ! 3 m4 ! 1 s0x0:0x0 ! 8平方米! 3 d46.7597222 ! 4 d36.7844444“rel = " nofollow noreferrer " > 46 45°35′N 36°47′04“E < / >。< / p > < p >目前,我住在另一个城市,非常接近海岸,海洋与坐标< a href = " https://www.google.com.au/maps/place/41%C2%B004& # 39; 09.0% 22 N + 73% c2%b051& # 39; 35.0% 22 W / @41.0691707, -73.8619162, 17个z / data = ! 3 m1 ! 4 b1 ! 4 m5 ! 3 m4 ! 1 s0x0:0x0 ! 8平方米! 3 d41.0691667 ! 4 d - 73.8597222”rel = " nofollow noreferrer " > 41°4′9“51′N 73°35 W < / >,我们有热,阳光明媚的夏天(每次30 - 35°C,有时多一点)。我很惊讶地发现积极的太阳在这里。我们需要防晒霜整整一个夏天,当我不得不在户外工作8个小时在9月初,我不知怎么晒伤。< / p > < p >给我童年的经历,对我来说是不可能想象,我能得到一个夏天晒伤的。我只是用来获得一个很好的在夏天晒黑,然后耐晒伤我的皮肤。 I wonder what is an explanation for this. One explanation could be that sun is more aggressive in my current town, than it was in my home town. But why? Another explanation, that there are some other factors involved, but I am not sure what these factors could be.

If anyone knows what is an explanation for this phenomenon, I would be most grateful for your help.

//www.hoelymoley.com/questions/10127/-/10141 # 10141 4 kingledion回答的两个城镇之间的差异在太阳活动(东部和西部半球) kingledion //www.hoelymoley.com/users/6703 2017 - 04 - 17 - t18:30:03z 2017 - 04 - 18 - t12:08:15z <标题>我相信这是生物学相关,不是天气相关的< / h1 > < p >我觉得你的故事有点有趣的,因为没有明显的证据表明,阳光能源存入你的皮肤是强在纽约比乌克兰。让我提供两条线的证据表明,这种变化更可能是有关你和你的皮肤比天气。< / p >

First, Rostov-on-Don, (the nearest large city I could find sunlight data for) has sunnier summers than New York. From NOAA via Wikipedia, Rostov has 286/314/293 hours of sunlight in June/July/August. New York has 257/268/268. This is largely because New York sees two more rainy days per month (and about twice as much rain on those rainy days) during the summer.

Sunlight intensity at a certain latitude is directly related to the angle of incidence of the sun. The declination of the sun is the relative angle from the sun to the horizon given your latitude and the time of year. The sun moves (well the Earth moves...) from the Tropic of Cancer to the Tropic of Capricorn each year, from 23.45 N to 23.45 S. During the northern hemisphere summer solstice, the sun is directly above the Tropic of Cancer. From New York, the angle of incidence of the sun is thus 41.07 N - 23.45 N = 17.62 degrees. During an equinox, when the sun is directly over the equator, the angle of incidence of the sun is 41.07 N - 0 = 41.07 degrees. The cosine of the angle of incidence is the percentage of full equatorial sunlight energy that you would receive at that latitude. Thus, in mid-summer in NY, you get cos(17.62) = 0.953 of maximum possible sunlight; at the equinox you get cos(41.07) = 0.754; at the winter solstice you get cos(64.52) = 0.430.

For any point in the Northern Hemisphere outside of the tropics, sunlight intensity will always be greater at all times of the year at lower latitude. Thus, New York always has greater sunlight intensity than Ukraine...but the difference is not very significant. At summer solstice NY gets 0.953 of the max sunlight, but Ukraine gets cos(23.3) = 0.918 of max sunlight. This is the difference between early July and mid-August in NY; not very significant. Given the close latitudes involved, you would expect to have gotten more net sun in the summer as a child than you do now due to fewer cloudy days. Since this is not what you observe, there must be some other explanation.

Secondly, I grew up near Boston, and my mom made me wear sunscreen in the summer. I used to get sunburns pretty bad. Now I'm 35 and I live in Virginia and I never wear sunscreen, even when I get to the beach. I don't remember the last time that I got a sunburn. Things change, I guess? This is a purely anecdotal observation, but then so is yours. Without any data to measure the changes (maybe I am smarter about being in shade in my older age?) all I can offer is guesses.

I think you should be looking at either your skin or your behavior as the cause of this change, not necessarily at the climate.

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